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Connecting Loudspeakers; Constant Voltage Loudspeakers - Bosch LBB 1930 Installation And Operating Manual

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4.5 Connecting loudspeakers

LBB1930
LBB1935
VU
Figure 4.7
VU
100V
F701
Figure 4.8

4.5.1 Constant voltage loudspeakers

The booster amplifier can drive 100 V constant voltage loudspeakers at full power (100 V) or half power (70 V).
Connect the loudspeakers in parallel and check the loudspeaker polarity for in-phase connection. The summed
loudspeaker power should not exceed the rated amplifier power.
Bosch Security Systems | 2003-09 | 3922 988 92983en
100V
70V
8Ohm
0
0
Figure 4.9
LBB1938
100V
70V
8Ohm
0
0
70V
F702
Priority Only
No Priority
0
0
Figure 4.10
External settings and connections
24V DC IN
100V 70V
0
0
8
-
+
100 V
70 V
8 Ohm
8 Ohm
8 Ohm
8 Ohm
8 Ohm
100 V
70 V
4 Ohm
4 Ohm
8 Ohm
Direct Output
100V
0
70V
0
8
Priority Controlled Output
Priority Only
No Priority
100V
0
100V
0
Priority Only No Priority
+
100 V
1
GND
-
2
GND
+
0V
3
1
2
3
-
100 V
100 V
70V
0
0
8
line out
8 Ohm
4 Ohm
4 Ohm
8 Ohm
8 Ohm
8 Ohm
8 Ohm
8 Ohm
War ning
This
appa
ratus
mus t
be earth
ed
en | 16
LBB1930
LBB1935
230 V-
240 V-
24V
DC IN
-
+
Line
fuse
250 V
T1A
War ning
App arat
This
appa
ratus
con nec
us deli
mus t
be earth
ted for
vere d
ed
230 V-
LBB1938

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